mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
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windows下子进程支持日志重定向、等待子进程推出、获取子进程退出码等特性
This commit is contained in:
xiongziliang
parent
8ef8c91f2e
commit
b08ea0fcc7
@ -24,19 +24,16 @@ const string kSnap = FFmpeg_FIELD"snap";
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onceToken token([]() {
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#ifdef _WIN32
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string ffmpeg_bin = System::execute("where ffmpeg");
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//windows下先关闭FFmpeg日志(目前不支持日志重定向)
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mINI::Instance()[kCmd] = "%s -re -i %s -loglevel quiet -c:a aac -strict -2 -ar 44100 -ab 48k -c:v libx264 -f flv %s";
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mINI::Instance()[kSnap] = "%s -i %s -loglevel quiet -y -f mjpeg -t 0.001 %s";
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string ffmpeg_bin = trim(System::execute("where ffmpeg"));
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#else
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string ffmpeg_bin = System::execute("which ffmpeg");
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mINI::Instance()[kCmd] = "%s -re -i %s -c:a aac -strict -2 -ar 44100 -ab 48k -c:v libx264 -f flv %s";
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mINI::Instance()[kSnap] = "%s -i %s -y -f mjpeg -t 0.001 %s";
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string ffmpeg_bin = trim(System::execute("which ffmpeg"));
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#endif
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//默认ffmpeg命令路径为环境变量中路径
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mINI::Instance()[kBin] = ffmpeg_bin.empty() ? "ffmpeg" : ffmpeg_bin;
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//ffmpeg日志保存路径
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mINI::Instance()[kLog] = "./ffmpeg/ffmpeg.log";
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mINI::Instance()[kCmd] = "%s -re -i %s -c:a aac -strict -2 -ar 44100 -ab 48k -c:v libx264 -f flv %s";
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mINI::Instance()[kSnap] = "%s -i %s -y -f mjpeg -t 0.001 %s";
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});
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}
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@ -16,6 +16,7 @@
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#else
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//#include <TlHelp32.h>
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#include <windows.h>
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#include <io.h>
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#endif
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#include <stdexcept>
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@ -31,23 +32,44 @@ using namespace toolkit;
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void Process::run(const string &cmd, const string &log_file_tmp) {
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kill(2000);
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#ifdef _WIN32
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STARTUPINFO si;
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PROCESS_INFORMATION pi;
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ZeroMemory(&si, sizeof(si)); //结构体初始化；
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ZeroMemory(&pi, sizeof(pi));
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STARTUPINFO si = {0};
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PROCESS_INFORMATION pi = {0};
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string log_file;
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if (log_file_tmp.empty()) {
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//未指定子进程日志文件时，重定向至/dev/null
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log_file = "NUL";
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}
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else {
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log_file = StrPrinter << log_file_tmp << "." << getCurrentMillisecond();
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}
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//重定向shell日志至文件
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auto fp = File::create_file(log_file.data(), "ab");
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if (!fp) {
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fprintf(stderr, "open log file %s failed:%d(%s)\r\n", log_file.data(), errno, strerror(errno));
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} else {
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auto log_fd = (HANDLE)(_get_osfhandle(fileno(fp)));
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// dup to stdout and stderr.
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si.wShowWindow = SW_HIDE;
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// STARTF_USESHOWWINDOW:The wShowWindow member contains additional information.
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// STARTF_USESTDHANDLES:The hStdInput, hStdOutput, and hStdError members contain additional information.
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si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
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si.hStdError = log_fd;
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si.hStdOutput = log_fd;
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}
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LPTSTR lpDir = const_cast<char*>(cmd.data());
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if (CreateProcess(NULL, lpDir, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)){
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if (CreateProcess(NULL, lpDir, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi)){
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//下面两行关闭句柄，解除本进程和新进程的关系，不然有可能 不小心调用TerminateProcess函数关掉子进程
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CloseHandle(pi.hProcess);
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CloseHandle(pi.hThread);
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_pid = pi.dwProcessId;
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fprintf(fp, "\r\n\r\n#### pid=%d,cmd=%s #####\r\n\r\n", _pid, cmd.data());
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InfoL << "start child proces " << _pid;
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} else {
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WarnL << "start child proces fail: " << GetLastError();
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WarnL << "start child proces fail: " << get_uv_errmsg();
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}
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fclose(fp);
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#else
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_pid = fork();
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if (_pid < 0) {
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@ -125,16 +147,42 @@ static bool s_wait(pid_t pid,int *exit_code_ptr,bool block) {
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if (pid <= 0) {
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return false;
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}
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int status = 0;
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#ifdef _WIN32
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HANDLE hProcess = NULL;
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hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, pid); //打开目标进程
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if (hProcess == NULL) {
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hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid); //打开目标进程
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if (!hProcess) {
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WarnL << "OpenProcess failed:" << get_uv_errmsg();
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return false;
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}
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DWORD code = 0;
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if (block) {
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//一直等待
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code = WaitForSingleObject(hProcess, INFINITE);
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} else {
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code = WaitForSingleObject(hProcess, 0);
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}
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if(code == WAIT_FAILED || code == WAIT_OBJECT_0){
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//子进程已经退出了,获取子进程退出代码
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DWORD exitCode = 0;
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if(GetExitCodeProcess(hProcess, &exitCode) && exit_code_ptr){
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*exit_code_ptr = exitCode;
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}
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CloseHandle(hProcess);
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return false;
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}
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CloseHandle(hProcess);
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if(code == WAIT_TIMEOUT){
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//子进程还在线
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return true;
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}
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//不太可能运行到此处
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WarnL << "WaitForSingleObject ret:" << code;
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return false;
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#else
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int status = 0;
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pid_t p = waitpid(pid, &status, block ? 0 : WNOHANG);
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int exit_code = (status & 0xFF00) >> 8;
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if (exit_code_ptr) {
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@ -148,11 +196,42 @@ static bool s_wait(pid_t pid,int *exit_code_ptr,bool block) {
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InfoL << "process terminated, pid=" << pid << ", exit code=" << exit_code;
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return false;
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}
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#endif // _WIN32
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return true;
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#endif // _WIN32
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}
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#ifdef _WIN32
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// Inspired from http://stackoverflow.com/a/15281070/1529139
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// and http://stackoverflow.com/q/40059902/1529139
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bool signalCtrl(DWORD dwProcessId, DWORD dwCtrlEvent){
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bool success = false;
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DWORD thisConsoleId = GetCurrentProcessId();
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// Leave current console if it exists
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// (otherwise AttachConsole will return ERROR_ACCESS_DENIED)
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bool consoleDetached = (FreeConsole() != FALSE);
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if (AttachConsole(dwProcessId) != FALSE){
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// Add a fake Ctrl-C handler for avoid instant kill is this console
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// WARNING: do not revert it or current program will be also killed
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SetConsoleCtrlHandler(nullptr, true);
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success = (GenerateConsoleCtrlEvent(dwCtrlEvent, 0) != FALSE);
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FreeConsole();
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}
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if (consoleDetached){
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// Create a new console if previous was deleted by OS
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if (AttachConsole(thisConsoleId) == FALSE){
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int errorCode = GetLastError();
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if (errorCode == 31){
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// 31=ERROR_GEN_FAILURE
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AllocConsole();
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}
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}
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}
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return success;
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}
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#endif // _WIN32
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static void s_kill(pid_t pid,int max_delay,bool force){
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if (pid <= 0) {
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//pid无效
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@ -161,13 +240,20 @@ static void s_kill(pid_t pid,int max_delay,bool force){
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#ifdef _WIN32
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HANDLE hProcess = NULL;
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hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, pid); //打开目标进程
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if (hProcess == NULL) {
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WarnL << "\nOpen Process fAiled: " << GetLastError();
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if (!hProcess) {
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//子进程可能已经推出了
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return;
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}
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if(force){
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//强制关闭
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DWORD ret = TerminateProcess(hProcess, 0); //结束目标进程
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CloseHandle(hProcess);
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if (ret == 0) {
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WarnL << GetLastError;
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WarnL << "TerminateProcess " << pid << " failed:" << get_uv_errmsg();
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}
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}else{
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//非强制关闭，发生Ctr+C信号
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signalCtrl(pid, CTRL_C_EVENT);
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}
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#else
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if (::kill(pid, force ? SIGKILL : SIGTERM) == -1) {
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@ -177,7 +263,6 @@ static void s_kill(pid_t pid,int max_delay,bool force){
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}
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#endif // _WIN32
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if(force){
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//发送SIGKILL信号后，阻塞等待退出
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s_wait(pid, NULL, true);
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